其他摘要：We investigated the distribution, structure and regeneration process of coastal Acer mono forests in Kaminokuni, Hiyama District, Hokkaido. In the study area, stands of Acer mono accounted for 48.8% of the total forest area. In three stands selected for intensive study, the height of dominant trees was 8.3 to 10.8m, and the total basal area was 23.42 to 30.31 m2/ha. Acer mono accounted for more than 99% of the total basal area in each stand. All stands had unimodal height distribution. The ratio of Acer mono stems that originated from sprouts ranged from 64.5 to 84.6%. Few seedlings were observed on the forest floor of each stand. The age distribution of Acer mono of single stems was unimodal. Peaks in the age distribution of stems of sprout-origin coincided with those of single stems. The difference in age of Acer mono of single stems was small in comparison to that of sprouts. We concluded that trees were regenerated from seeds and vegetative regeneration following a disturbance, and that Acer mono stands are assumed to be maintained by the continuous occurrence of adventitious shoots.
